lock items/props duration
eg. when you have more than one items on a scene, say you have 2 items first item duration is 2 sec and second items duration is 3 sec, and when you drag the main timeline to adjust the voice-over clip, which is more than 5-sec lets say 10 sec, doodly automatically adjust the duration of both items in equal duration, but you want to lock the duration of the first item to 2 sec. so that when you drag the main timeline, it should only increase the second items duration.